Okay to run original ETA pistons with 885 (i) head if I'm going to turbo?

[hasa]

Why not boost whole engine as it is? Is this a some oddball high compression engine which can't take 1bar/14psi unopened.

[digger]

It will work fine, even though not the most ideal boost fixes everything.

[jc1000]

I think it's because the head doesn't quite match up with pistons. It will work. ForcedFirebird knows best about this.

ForcedFirebird would love to hear your thoughts!

[It's Soda Not Pop]

I think it's because the head doesn't quite match up with pistons. It will work. ForcedFirebird knows best about this.

[jc1000]

https://strictlyeta.net/technical/328i/

https://www.r3vlimited.com/board/forum/e30-technical-forums/engine-drivetrain/m20/243337-eta-to-i-head-swap-questions

Read through this and should be able to give you some insight.

Thanks. Yes, in that first source (strictlyeta), he doesn't seem to like the idea of keeping the ETA pistons. But I am hearing that a lot have done it and had good results.

[digger]

Add the b25 topend and induction and then boost it

[It's Soda Not Pop]

https://strictlyeta.net/technical/328i/

https://www.r3vlimited.com/board/forum/e30-technical-forums/engine-drivetrain/m20/243337-eta-to-i-head-swap-questions

Read through this and should be able to give you some insight.

[jc1000]

Hello! I have a 1987 325 with the M20B27 ETA. I am looking to make more power and have decided to try the stroker option plus turbo. What I am having a hard time deciding is whether it is worth swapping out the pistons. I would likely go with 325i pistons if I can find them (and have to change the rods) or possibly custom ones. This will be my first engine build, so I would like to avoid doing so if possible, but am also willing to prioritize it if need be. I am pretty new to the scene and have relatively low expectations and would also like to be as "economical" as possible. Thanks for your thoughts.